Investigation on corrosion mechanism of stirring paddles of different iron-based materials in ZL101 aluminum melt

Yuan, Bei; Liao, Dunming; Jiang, Wenming; Deng, Han; Li, Guangyu

doi:10.1016/j.jmrt.2021.06.011

Cited by 4 publications

(4 citation statements)

References 32 publications

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“…From the kinetic constants of Al 8 Fe 2 Si at different temperatures, the reaction rate increases rapidly with rising temperature. The diffusion reaction preferentially reacts at a high energy position, such as the cavity and dendrite gap [17]. This phenomenon was found in this work; the high-energy grain boundaries with vacancies, dislocations, and segregation of elements promote the diffusion reaction, as shown in Figure 12.…”

Section: Discussionsupporting

confidence: 67%

“…Additionally, they proposed that the DIN 1.2367 steel with high Mo and low Si resists erosion better than AISI H13 steel. The literature proved that the flake graphite in the HT300 steel prevented the diffusion reaction at stirring compared to A3 steel and QT5381 steel [17].…”

Section: Introductionmentioning

confidence: 98%

“…Based on the complex erosion mechanism and the lack of standardized test equipment, the studies focused on evaluating the corrosion resistance of different materials through failure analysis and specific tests [4,9,11,12,16,17]. The effect of temperature and time on erosion was not systematically studied.…”

Section: Introductionmentioning

confidence: 99%

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Research on the Corrosion Behaviors of Austenitic Steel in Molten Aluminum Alloy

Bai

Yang

et al. 2022

Coatings

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Die corrosion has been a concern during aluminum alloy die casting. The casting parameters play a significant role in causing corrosion, such as the temperature of the aluminum alloy melt and working time. In order to study the effect of temperature and working time on dynamic corrosion behaviors, SDHA steel was stirred in molten ADC12 aluminum alloy at 650–800 °C. The corrosion morphology and corrosion product were investigated through X-ray diffraction (XRD) and scanning electron microscope (SEM) observations. The results show that the matrix reacts with aluminum alloy to form an Al8Fe2Si phase at experimental temperatures. The growth activation energy of the Al8Fe2Si phase is 89 kJ/mol. The dynamic corrosion rate rises with increasing temperature and holding time. The most serious corrosion was found when the experimental temperature reached 800 °C, which is closely related to the peeling of matrix and the formation of Al8Fe2Si at the grain boundary. Besides, the vanadium carbides in the matrix act as barriers to hinder the diffusion of Al and Si atoms effectively.

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Section: Discussionsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 98%

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Research on the Corrosion Behaviors of Austenitic Steel in Molten Aluminum Alloy

Bai

Yang

et al. 2022

Coatings

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“…These challenges are the main cause of the continuous hot-dip coating lines downtime that result in a significant economic loss to the galvanizing industry. Therefore, selection of the right materials for the pot gears and their corrosion in the coating alloy have been recognized as one of the key factors in resolving the challenges faced by the galvanizing industry [16,17]. Industrially, stainless steel 316L has been used for the fabrication of rolls (sink, guiding and stabilizing).…”

Section: Introductionmentioning

confidence: 99%

Intermetallic Compounds Formation during 316L Stainless Steel Reaction with Al-Zn-Si Coating Alloy

et al. 2022

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Steel products are coated with Aluminum (Al) and Zinc (Zn) alloys to improve their corrosion properties. Bulk steel products are coated in batches; however, steel sheets are coated by a continuous hot-dip galvanizing process. Steel sheets are guided into and out of the molten Al-Zn-Si (AZ) bath with the help of stainless-steel rolls, known as guiding, and sink rolls. These rolls are subjected to excessive surface corrosion with molten AZ bath and, hence, are replaced frequently. The surface deterioration of the immersed rolls has been a long-standing issue in the galvanizing industry. In this study, 316L stainless-steel (SS) rods are immersed in the AZ alloy at 600 °C. The immersion time varied from 1 day to 7 days under the static melt conditions in the iron (Fe)-saturated AZ bath. Microstructural analysis of the immersed SS samples revealed two distinct intermetallic compound (IMC) layers forming between the SS substrate and AZ alloy. The IMC layer 1 (AL-1) formed between the SS substrate and IMC layer 2 (AL-2), growing in thickness from 68 µm to 120 µm within 5 days of immersion. The AL-2, which formed between AL-1 and AZ alloy after 24 h of immersion, then grew in thickness up to 150 µm with an uneven trend. The AL-1 is composed of Fe2Al5 and that of AL-2 is composed of FeAl3 that were predicted by the FactSage thermodynamic analysis. Crack development between AL-1 and AL-2 layers, and disintegration of AL-2 into the AZ bath, are key findings of this study. A drastic hardness increase was observed because the IMC layers produce a hard and brittle sink roll surface.

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Corrosion characteristics and prediction model of aluminum alloys in saturated Na2SO4 solution

Sun,

Liang,

Chen

et al. 2023

Materials Chemistry and Physics

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Investigation on corrosion mechanism of stirring paddles of different iron-based materials in ZL101 aluminum melt

Cited by 4 publications

References 32 publications

Research on the Corrosion Behaviors of Austenitic Steel in Molten Aluminum Alloy

Research on the Corrosion Behaviors of Austenitic Steel in Molten Aluminum Alloy

Intermetallic Compounds Formation during 316L Stainless Steel Reaction with Al-Zn-Si Coating Alloy

Corrosion characteristics and prediction model of aluminum alloys in saturated Na2SO4 solution

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